Safety brake for vehicles



Jan. 12, 1932. A. F. KRUEGER SAFETY BRAKE FOR VEHICLES Filed Aug. 27, 1929 2 Sheets-Sheet R w w d. M m 9 v w n MVN A f /MJB U Aww www uw M. Ill Nm wml Jan. 12, 1932-. A. F. Kaul-:GER

SAFETY BRAKE FOR VEHICLES Filed Aug. 27, 1929 2 sheets-sheet 2 Q @wf .fm/LWR w BY #QJW ATTO R N EY S Patented Jan. 12, 1932 UNITED STATES f renate PATENT eiseres AUGUST F. KRUEGER, OF BROOKLYN, NEW YGRK, ASSIGNOR TO THE PILGRIM STEAM LAUNDRY COMPANY, F BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK SAFETY BRAKE FOR VEHICLES Application led August 27, 1929. Serial No. 383,662.

This invention relates to 'improvements in vehicle brakes.

It is a primary object of the invention to provide an auxiliary lock for emergency brakes to prevent the brake from being released in the usual manner on the release of the brake-holding apparatus. v

The above and other objects will appear more fully from the following description i io when considered in connection with the draw- '3;20 unattended while delivering articles, there has been the constant difficulty that some unauthorized person, for example a child, may accidentally or maliciously release the brake and permit the vehicle to coast down hill with the attendant probabilities of danger to the truck or persons or property in thepath of t travel. The present invention overcomes the above difficulties by providing a separate Y brake control member which must be released independently of the usual brakey releasing devices before it is possible to move the vehicle.

v'Referring to the details of the drawings,

linkage to the brake pedal 22. This brake yis customarily known as the emergency brakel and, in the form shown, includes a tiltable foot pedal 24 having portions 26 engageable to lock the brake in any position Ato which it is moved. The brake lever 22 may be released through pressure on the pedal 24 after which the pedal may be tilted to a non-locking posi` tion and the brake released. The emergency A second brake 18 is connected by suitablewith the teeth of the duplicate rack bars 28v brake lever 22 is normally retained in inactive position by the usual devices shown for example as a return spring 30.

In applying my invention to the vehicle brakes described above I provide a rack 32 formed with teeth 34 and pivotally supported as at 35 on the lever 22. The rack teeth 34 are constructed to successively engage a iixed stop member 38 suitably supported on the vehicle frame and effective to maintain the rack bar 32 and lever 22 in any position to which the same may be moved. The teeth 34 and 28 are prei'erably co-ordinated so that the rvengagement lugs on the pedal 24 will engage a tooth 28 at the same point that one oi' the teeth 34 engages behind and to this end stop 38 may7 be made adjustable if desired. A retaining spring 40 serves to retain the teeth nori'nally in engagement with the stop 38.

Since the locking engagement between the teeth 34 and stop 38 is oi an emergency nature and intended to be released only by authorized persons, the pivot 36 for the rack bar 32 is positioned beneath the plane of the teeth 34 so that on elevation of the bar 32 the teeth 34 tend to move rearwardly and upwardly. This construction requires apredetermined applieation of pressure to the pedal 22 before the rack bar can be elevated and the brake released.

The release of the bar 32 is ei'lected, after the initial pressure has been applied to the lever 22, by means of the link 42, bell crank lever 44 and manual control member 46. The latter is preferably positioned at a point re' mote from'the brake pedal 24 and having no apparent connection with the same since the linkage yfor thev brake and releasing devices is all beneath the iloor of the vehicle.y As

shown the hand lever 4G is positioned close" ly adjacent to thedrives seat 12, although the lever may be positioned either in front of the seat, as shown, or beside the same, or in any other position convenient for operation by the car operator.

In the use oi the abovev apparatus the service brake 16 may be applied and released at any .time in the usual manner. The emergency brake may be applied through pres-y l velectric delivery trucks.

sure on the foot pedal 24 and the same latched in any applied position by suitably tilting the latch pedal 24. The forward movement of the emergency brake lever 22, however, carries with it the rack bar 82 with the result that the lever 22 is independently locked in its forward or applied position by means of the rack teeth 34 and stop 38. If any vunauthorized person should attempt to release the brake through manipulation of .the foot pedal 24 such efforts will be unsuccessful due to the locking etlect of the rack bar 34. To release the brake it is necessary to apply a certain pressure to the brake .pedal 24V so that this pedal can be tilted to its inactive position. At this time the rack teeth 34 are released from their engagement with the stop 38 and the operator may move the handle 46 upwardly and free the emergency Ybrake i'ormovement to non-braking position.

A movable raclr bar 32a. similar to the rack bar 32 and formed with teeth for engagement with a fixed stop 38a sothat the emergency` brake will be held applied to any extent to which thesaine is operated. l'Ihe rack bar 32a is released by links 42a extending from bar 32a to asuitable lever operated by the emergency release lever shown asa foot pedal 48. The pedal 48 is Vremote from thel hand lever `21 and without any apparent conl iiection to the same so as to give no suggestion to anyone unacquainted with the mechalnism that it requires the actuation of the foot pedal 48before the emergency brake can be released. The pedal 48, as shown. is placed in Jfront of and near the driversl seat 12a.

Ihe operation of the second form of the invention is the same as Vthat described above in connection with Fig. 1 and willl need no additional description.

Having now described my invention, I claim: Y

l. In combination, a vehicle brake, an operating member including means for applying said brake and locking the same in the applied condition, auxiliary means associated with said brake for locking the same in the applied condition and means for automatically applying said auxiliary locking meaiison applying Vsaid brake.

V2. In combination with a veli'cle, an emergency brake therefor, a brake lever provided with manually controlled releasable locking mechanism for applying said brake and said auxiliary lock positioned remote from said brake lever and operative to release said auxiliary lock.

3. In combination with a vehicle, an emergency brake therefor, a return' spring for said brake, brakeI lever provided with manually y controlled releasable locking mechanism for applying said bralre maintaining theA sameapplied, an auxiliary lock for said bralre operative to hold saidbralre in appliedv position, said auxiliaryv loch including a movable locking elementnormally held in locked position by the power ot said return spring, and means ier automatically applying said auxiliary lockY coincidently with the application oi' said emergency bralre.

4. In combination with a vehicle, an emergency bralre therefor, manually controlled reieasable locking mechanism oi1 applying said bralre and maintaining the same applied, an auxiliary loch icor'said brake yoperative to maintain said brake in applied position, and means for automatically applying said auxiliary lock coincidently with the application of said emergency brake, said auxiliary loclr including a movablev locking element and a coacting relatively xed element, said elements being constructed to re- Vquire the further application of said brake before said elements can be disassociated and said Vauxiliary loch unlocked'. p

5. In combination with a vehicle provided with an operators seat, a brake for said vehicle, a brake applying lever positioned substantially in advance of said Vseat and provided with locking devices for/maintainingy the saine in applied position, and auxiliary loclring mechanism for maintaining saidbralre applied, and means i'orV automatically applying said auxiliary loch coincidently with the application oi said emergency brake, means for releasing said` auxiliary lock, said last-named means including a control member positioned remote rom said brake applying lever and adjacent said operators seat.

6. Incombination with a vehicle provided with an operators seat, a brake for said vehicle, a brake applying toot lever positioned substantially in advance of said seat and provided with toot released locking devices or maintaining the same iiiV applied position, an

kauxiliary locking mechanism for maintainbrake applying lever and adjacent said operators sea-t.

7. In combination with a vehicle, a brake for said vehicle, a brake applying foot lever provided with foot released locking devices for maintaining the same in applied position, an auxiliary locking mechanism for maintaining said brake applied, means for automatically applying said auxiliary locking mechanism coincidently with the application of said brake, means for releasing said auxiliary locking mechanism, said last-named means vincluding a hand actuated control member positioned remote from said brake applying lever and means connecting said hand actuated member with said auxiliary locking mechanism, the release of said auX- iliary locking mechanism and the movement thereof to unlocked position requiring a predetermined forward movement of said brake 'applying lever.

' Signed at New York, in the county of New York and State of New York, this 26th day of August, A. D. 1929.

AUGUST F. KRUEGER. 

